Calculate the entropy change when 9 grams of water change from the liquid state to the vapor state at 100 ° c and at the pressure of one atm. The heat of evaporation of water is 540 cal / gram.

The answer is frictional force

Give me some answer choices and i will be happy to

The chemical reactions lab we did is typically called a "copper plating lab,  because the acid solution cleaned the pennies and made the copper look shinier;   the acid solution cleaned the paperclips and made them look like pennies;   &   the copper from the pennies was removed, and then added to the paperclips.